Lubricating device



May 8, 1934- H. R. TEAR 1,958,216

LUBRICATING DEVICE Filed Dec. 13, 1932 MHIIIIIIQBEE i 2l .F INVENTOR. H?ere T565 TTORNEY Patented May 8, 1934 UNITED STATES PATENT OFFICELUBRICATIN G DEVICE Application December 13, 1932, Serial No. 647,011

6 Claims.

This invention relates to improvements in lubricating devices and, moreparticularly, to lubricant cartridge connecting means for establishingfluid tight connection between lubricant cartridges and lubricatingyguns, feeding devices and dispensers.

An object of the invention is to provide a cartridge connector stud fora lubricant gun or other lubricant feeding device adapted to provide a llubricant tight seal by contact under thrust with the walls of an outletopening of a specific type of lubricant cartridge wherein the saidoutlet walls are fashioned to cooperate with the external surface of thestud and which prohibits the establishment of a lubricant tight sealwith cartridges other than those specifically designed for use with thegun or other lubricant feeding apparatus. This feature assures the useof the proper lubricant both as to quality and species for the gun ordevice so equipped when it becomes necessary for the operator topurchase cartridge refills.

Another object is to provide a cartridge connector stud as describedwhich may be manufactured at relatively low cost and which may bereadily removed and replaced with one of conventional structure, ifdesired.

Other objects, the advantages and uses of the invention will be orshould be apparent after reading the following description and claimsand after considering the accompanying drawing, in

which: i

Fig. 1 is a sectional view of a hand lubricant gun equipped with acartridge connector stud and cartridge constructed in accordance withthe inven- Fig. 2 is an enlarged fragmentary sectional view of theconnector stud of Fig. l illustrating the attempted use of a cartridgeother than one specifically designed therefor;

Fig. 3 is an enlarged fragmentary sectional view of a modified form ofthe connector stud for use with the cartridge of Fig. l;

Fig. 4 is a view similar to Fig. 3 of another form of connector stud andcartridge outlet; and

Fig. 5 is a view similar to Fig. 3 of a further form of the stud andcartridge outlet construction.

In general, the apparatus selected for illustration herein comprises, ahand lubricant gun having a pump cylinder A, a manually operable pistonB, a discharge nozzle C, a cartridge housing D, a cartridge connectorstud E through which lubricant may be admitted to the cylinder A, havingits external surface adapted for contact with the inner surface of theside walls of theoutlet opening F of a lubricant cartridge G receivableWithin the housing D, a piston H forming a movable end closure for theremote end of the cartridge and a compression spring J bearing upon thepiston H to place' the lubricant contents of the cartridge under slightpressure and to thrust the cartridge upwardly into close contact withthe connector stud E. A feature of the invention consists in truncatingthe connector stud E at an angle other than 90 to its longitudinal axisthereby causing one side wall of the stud to extend further away fromthe gun cylinder than its I opposed side.

Referring in particular to Fig. 1 the hand gun shown therein is one of awell known type including a hand grip 2 for the manual reciproca- 70tion of the piston B within the cylinder A. Lubricant is admitted to thecylinder through an inlet port comprising a central passageway 3 throughthe stud E having a ball check valve 4 therein to preent the return flowof lubricant l during the pressure stroke of the piston. A springpressed cylinder outlet check Valve 5 is l located between the forwardend of the cylinder and the discharge nozzle C to assure a reducedpressure in the cylinder during the return stroke of the piston fordrawing lubricant into the cylinder and to prevent the return oflubricant through the discharge nozzle under back pressure in thebearing or part lubricated. The connector stud E may be secured to thecylinder A through the medium of an externally threaded shank 6. Thestud may be further formed with a hexagonal ilange 7 for receptionbetween the jaws of a wrench as when the stud is screwed in place and bymeans of which, the housing D is held in place upon the gun cylinder asshown.

In the structure of Figs. l to 3, the outer wall surface of theconnector stud-is spherical as shown at 8 and the inner wall 9 of thecartridge outlet opening F of the cartridge G is similarly formed so asto provide a universal contact jointtherebetween, a feature whichprovides for an adequate lubricant tight seal between the stud and thecartridge outlet opening even though the cartridge becomes slightlycanted within the housing D. To facilitate the installation and removalof the cartridge to and from the gun, a removable cap 11 is provided forthe housing D, to which the lower end of the spring J may be permanentlyxed as indicated at l2.

With the parts assembled as shown in Fig. 1 the spring J serves to placethe lubricant contents of the cartridge G under slight pressure and totransmit thrust, through the lubricant, to the cartridge in thedirection of the connector stud E,

v thereby causing a lubricant tight seal between the stud E andcartridge outlet walls 9 in direct proportion to the pressure to whichthe lubricant in the cartridge is subjected. The outer end wall 15 ofthe connector stud formed by the truncating of the stud E as shown inFigs. l and 3 lies well beyond the contacting surfaces of the stud andcartridge outlet wall so as not to destroy the annular sealtherebetween. If, however, attempt is made to install a cartridge K ofconventional structure representing other than that type of cartridgeintended for use with the gun or feeding apparatus, the result, as shownin Fig. 2, will be that the truncated portion of the stud prohibits theformation `of a lubricant tight seal between stud and cartridge outletopening or any satisfactory communication therebetween. The operator isthus protected against the unintentional use of lubricants other thanthose expressly compounded for the particular gun or apparatus in use.

The cartridge connector stud of Fig. 3 differs from that of Figs.V 1 and2 only in that the wall 15 of the stud is cylindrical and concavewhereas the wall 15 of the latter is at.

Another formV of the connector stud E and cartridge outlet opening F isillustrated in Fig. 4, wherein the outer wall 16 of the stud is conicaland truncated to provi'de an inclined iiat end wall 15. The wall 17 ofthe outlet opening F is likewise of conical contour tocorrespond withthe wall 16 of the stud. ,The function and operation of this form of thecartridge connector. means is identical to that heretofore describedexcept that a universal sealing contact between the stud and cartridgeof a nature to permit canting of the cartridge is absent.

In Fig. 5 a further form of the stud and cartridge outlet is shownwherein the stud E is formed with straight non-functional side walls 18and is truncated at an angle other than 90 to form an inclined end Wall15. The end wall 15 is further formed with a hemispherical pocket 19therein communicating with the passage 3 of the stud within which anembossed spherical surfaced extension 21 of the cartridge end wall 22 isadapted to fit. 'I'he cartridge outlet opening F consists of arelatively small aperture formed through the central portion of theextension 21 and is therefore aligned with the passage 3 of the stud. Inthis form of the cartridge connector means, universal contact betweenthe stud and cartridge is attained as in the forms of Figs. land 3, andthe truncating of the stud prohibits the successful use of other thanthe particular design of cartridge intended for use with the gun.

The angle of inclination of the end wall l5 relative to the axis of thestud E depends in part upon the depth to which the stud enters withinthe side walls of the cartridge outlet opening, but it is suggested thatfor best'results that it lie with a range of from 10 to 40 from a planeperpendicular'to the axis of the stud.

It is to be understood that the embodiments of the invention herein setforth are presented for the purpose of illustration only, and variouschanges may be made therein without departing from the spirit and scopeof the appended claims.

I claim: 1

l. A cartridge connector-stud, for establishing a fluid connectionbetween a fluid dispensing device and an apertured fluid-containingcartridge, said stud having a spherical contact surface for contact withthe wall portion of said cartridge about said aperture, the outer end ofsaid stud being cut away in a plane inclined with respect to thelongitudinal axis of the stud.

2. Cartridge connector means for providing a detachable fluid connectionbetween a lubricant cartridge and, a lubricant dispensing apparatuscomprising, a tubular member adapted to be xed to said dispensingapparatus to serve as a lubricant inlet therefor, said member having asubstantially spherical walled pocket formed in its outer endcommunicating with the bore thereof and being truncated in a planeintersecting said pocket and inclined with respect to the longitudinalaxis of the member.

3. A cartridge connector stud comprising, a shank and a normally exposedspherical cartridge-engaging body portion, said body portion beingtruncated in a plane inclined with respect to the axis of the shank atan angle other than 90.

4. A cartridge connector stud for establishing a fluid connectionbetween a uid dispensing device and an apertured fluid-containingcartridge comprising, a body having a fluid conducting passagewaytherethrough, saidbody having a sealing surface extending completelyabout one end portion of said passageway, said sealing surface beingbounded at one side'by a surface the general plane of which lies at anangle between a straight angle and a right angle to the axis of said endportion of said passageway.

5. A cartridge connector stud for establishing a fluid connectionbetween a fluid dispensing device and -an apertured fluid-containingcartridge comprising, a body having a fluid conducting passagewaytherethrough, said body having an external sealing surface completelysurrounding said passageway, said surface being a spherical zone boundedat one side by a perimeter that lies at an angle between a straightangle and a right ,angle to the axis of said body.

6. A cartridge connector stud for establishing a uid connection betweena fluid dispensing device and anfapertured fluid-containing cartridgecomprising, a body having a fluid conducting passageway therethrough,said body having an annular sealing surface extending completely aboutone end of said passageway, said sealing,` surface being bounded at oneside by a surface, the general plane of which lies at an angle between astraight angle and a right angle to the axis of said body.

HARRY R.

